Blog post for Juno

Ok, here's my first blog post for GSoC – if I remember rightly we decided to post them on julialang.org. Let me know if it's way off base or not what you're looking for, I can always change it / put it up somewhere else.

We might want to wait until the rename is properly finished to put this up since it's a little confusing, I don't mind too much though.
Woops, I'm normally more careful than that – thanks.